hang in X libraries...

In XEmacs 21.2 (beta32) "Kastor & Polydeukes" [Lucid] (sparc-sun-solaris2.7) of Wed Apr 19 2000 on rhea configured using `configure --prefix=/export/users/hamishm/xemacs --site-prefixes=/export/users/hamishm/gnome:/export/users/hamishm --pdump --with-athena=xaw --with-menubars=lucid --with-scrollbars=lucid --with-dialogs=athena --with-widgets=athena --with-dragndrop=no --with-tooltalk=no' cvs-upped on April 19 9:33 EDT XEmacs has been periodically hanging on me. When I interrupt it in gdb, I get the following: (gdb) where full #0 0xfed9437c in _poll () from /usr/lib/libc.so.1 No symbol table info available. #1 0xfed4e3e4 in select () from /usr/lib/libc.so.1 No symbol table info available. #2 0xff0ed298 in _XWaitForReadable () from /usr/lib/libX11.so.4 No symbol table info available. #3 0xff0b3514 in _XRead () from /usr/lib/libX11.so.4 No symbol table info available. #4 0xff0b57dc in _XReply () from /usr/lib/libX11.so.4 No symbol table info available. #5 0xff0c7f3c in XQueryColor () from /usr/lib/libX11.so.4 No symbol table info available. #6 0x1ca8f8 in x_generate_shadow_pixels (f=0x20, top_shadow=0xffbedf1c, bottom_shadow=0xffbedf18, background=13354438, core_background=13354438) at redisplay-x.c:1609 dpy = (Display *) 0x425000 cmap = 32 visual = (Visual *) 0x3a6a60 topc = {pixel = 13354438, red = 65535, green = 65535, blue = 0, flags = 0 '\000', pad = 0 '\000'} botc = {pixel = 13354438, red = 65535, green = 65535, blue = 65535, flags = -1 'ÿ', pad = -1 'ÿ'} top_frobbed = 0 bottom_frobbed = 0 #7 0x1c8134 in x_bevel_area (w=0x14f1000, findex=1, x=4, y=784, width=1121, height=18, shadow_thickness=2, edges=15, style=EDGE_BEVEL_OUT) at redisplay-x.c:549 obj = -4268264 shadow_thickness = 2 ef = 0x15d1900 dpy = (Display *) 0x425000 x_win = 92284037 top_shadow_pixel = 13354438 bottom_shadow_pixel = 13354438 background_pixel = 13354438 tmp_pixel = -4268264 tmp_color = {pixel = 13354438, red = 52171, green = 50629, blue = 50886, flags = 7 '\a', pad = 0 '\000'} gcv = {function = -1, plane_mask = 4294967295, foreground = 4294967295, background = 4294967295, line_width = -1, line_style = -1, cap_style = -1, join_style = -1, fill_style = -1, fill_rule = -1, arc_mode = -1, tile = 4294967295, stipple = 4294967295, ts_x_origin = -1, ts_y_origin = -1, font = 4294967295, subwindow_mode = -1, graphics_exposures = -1, clip_x_origin = -1, clip_y_origin = -1, clip_mask = 4294967295, dash_offset = -1, dashes = -1 'ÿ'} top_shadow_gc = 0x38 bottom_shadow_gc = 0x5802485 background_gc = 0x424400 use_pixmap = 0 flip_gcs = 0 mask = 22878464 #8 0x17f75c in bevel_modeline (w=0x14f1000, dl=0x1744000) at redisplay-output.c:2344 maybe_contype_meth_meth = (struct console_methods *) 0x343000 x = 4 y = -4268256 width = 8 height = 0 shadow_thickness = 2 style = 529622 #9 0x1c7f48 in x_output_display_block (w=0x14f1000, dl=0x1744000, block=0, start=10838016, end=157, start_pixpos=4, cursor_start=0, cursor_width=0, cursor_height=0) at redisplay-x.c:507 cursor_width = 0 buf = (Emchar_dynarr *) 0x128f620 db = (struct display_block *) 0x14f1000 rba = (rune_dynarr *) 0xe30aa0 rb = (struct rune *) 0x16f6380 elt = 157 findex = 1 xpos = 1120 width = 0 charset = -22601496 #10 0x17fe20 in redisplay_output_display_block (w=0x14f1000, dl=0x1744000, block=0, start=0, end=157, start_pixpos=14879392, cursor_start=0, cursor_width=0, cursor_height=0) at redisplay-output.c:1134 cursor_start = 24395776 cursor_width = 0 cursor_height = 24395776 #11 0x17b9a0 in output_display_line (w=0x14f1000, cdla=0x0, ddla=0xf008e0, line=0, force_start=4, force_end=1125) at redisplay-output.c:650 old_b = (struct buffer *) 0x1612e00 cdl = (struct display_line *) 0x0 ddl = (struct display_line *) 0x1744000 cdba = (display_block_dynarr *) 0x0 ddba = (display_block_dynarr *) 0xe30a00 start_pixpos = 4 end_pixpos = 1125 cursor_start = 0 cursor_width = 0 cursor_height = 0 force = 1 clear_border = 0 must_sync = 0 #12 0x1cacb8 in x_redraw_exposed_window (w=0x14f1000, x=4, y=26, width=0, height=0) at redisplay-x.c:1729 cdl = (struct display_line *) 0x1612e00 top_y = 23145984 bottom_y = 1125 line = 0 start_x = 4 start_y = 26 end_x = 1125 end_y = 802 orig_windows_structure_changed = 0 cdla = (display_line_dynarr *) 0xf008e0 #13 0x1cadc4 in x_redraw_exposed_area (f=0xbcf600, x=0, y=0, width=1129, height=820) at redisplay-x.c:1753 obj = 21958656 window = 21958656 x = 0 y = 0 width = 1129 height = 820 #14 0x1b6a10 in emacs_Xt_handle_magic_event (emacs_event=0x1058330) at event-Xt.c:1775 event = (XEvent *) 0x1058344 #15 0xdaddc in execute_internal_event (event=17138480) at event-stream.c:527 No locals. #16 0xdd1dc in Fdispatch_event (event=17138480) at event-stream.c:4208 console = 3672832 channel = 12383744 #17 0x7c090 in Fcommand_loop_1 () at cmdloop.c:575 event = 17138480 old_loop = -22601496 gcpro1 = {next = 0xffbee5d8, var = 0xffbee4cc, nvars = 1} gcpro2 = {next = 0xffbee4e0, var = 0xffbee4c8, nvars = 1} was_locked = 0 #18 0x7c334 in command_loop_1 (dummy=-22601496) at cmdloop.c:490 No locals. #19 0x9d728 in condition_case_1 (handlers=2572288, bfun=0x7c2e8 <command_loop_1>, barg=-22601496, hfun=0x7c394 <cmd_error>, harg=-22601496) at eval.c:1644 obj = 508648 speccount = 0 c = {tag = 19349416, val = -22601496, next = 0xffbee730, gcpro = 0x0, jmp = {0, -4266640, 644788, 1056, 256, 0 <repeats 11 times>, -4931584, 671744, 0}, backlist = 0x0, lisp_eval_depth = 0, pdlcount = 0} gcpro1 = {next = 0x0, var = 0xffbee6b4, nvars = 1} #20 0x7c4a4 in command_loop_2 (dummy=-22601496) at cmdloop.c:252 No locals. #21 0xa52fc in internal_catch (tag=-22769328, func=0x7c458 <command_loop_2>, arg=-22601496, threw=0x0) at eval.c:1310 c = {tag = -22769328, val = -22601496, next = 0x0, gcpro = 0x0, jmp = { 0, -4266288, 676552, 3665408, 3397632, 0, -4265272, 2013265920, -4266032, 529116, 0, 3659776, -22601496, 3659776, 0, 3393536, -4497408, 237568, 0}, backlist = 0x0, lisp_eval_depth = 0, pdlcount = 0} #22 0x7b7ec in initial_command_loop (load_me=-22601496) at cmdloop.c:301 No locals. #23 0x995c4 in sort_args (argc=2161664, argv=0xffbee9a4) at emacs.c:1873 stack_bottom_variable = 0 '\000' skip_args = 36 load_me = -22601496 inhibit_window_system = 0 (gdb) call Fbackratrace(Qexternal_debugging_output , Qt) # (condition-case ... . error) # (catch top-level ...) $4 = -22601496 (gdb)